{
  "manageEntity": {
    "action": "Save",
    "entityId": "970571253",
    "entityType": "Track",
    "nonce": "0xde893a9cde44c28751685cb808c6cba7b099588f6744cc8dcec4c69efc1e6c77",
    "signature": "0x411271a3a04eddc79af2cb3bc4046d489861fbb88b485b9d62bc1205895709f41b946f8e9a2f37c967d8d47e044a8d7550720f7f2db7f3ea1f449981f64561bf1c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}