{
  "manageEntity": {
    "action": "Save",
    "entityId": "1469647039",
    "entityType": "Track",
    "nonce": "0xeee176a7926efb640999b64c3fbb3ae47adf67699db2a46bc3e8718ff376ed13",
    "signature": "0x8b77b57b8ac57e1536192f196124ef6cd537750bd1c3dddf6f844d5eb8963c6b393f2e380c7d26cc68b0788f95f11eb2be3748d746c6e0cd671c70feb6e38c291c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}