{
  "manageEntity": {
    "action": "Save",
    "entityId": "295135866",
    "entityType": "Track",
    "nonce": "0xb3de870e1d282ef413c57248540e0b2f511c666d7721bf436b60af90038c7173",
    "signature": "0x6d14ab35eec9e573c2f43899da7ec5aa55558eee7fe7b651087f1c8e4d9200364d2c19b34784ce15f49996000f060984f7a2fd7c2deaed69d7aec5666b3f9bd31b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}