{
  "manageEntity": {
    "action": "Save",
    "entityId": "1752106586",
    "entityType": "Track",
    "nonce": "0x6cfea61374b888ec1f47ce65148adface4b6cd3f4e6569ec19e3da8b6bd5aa8f",
    "signature": "0xf4011cf9db182dc9f5161c45adc0adba290c12f51b6a45ac36381dbcdebd2e903ce5abd32876a97ea834da8d365b8cf0edfe5417c69852682552f296618d72031c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}