{
  "manageEntity": {
    "action": "Save",
    "entityId": "839884172",
    "entityType": "Track",
    "nonce": "0x0ea020b6486b64aeef41efc09f10a94ea751f8796e532e9522b17a0666b45e9b",
    "signature": "0xcd76750c03c4e654f0bc2e654f31081504606aeea71881c972ff54b684c781ac717855c8cb8a577b6836b60fd72b7c98dee08ded7fcc9a19e9591c50120a0c021b",
    "signer": "0xab28764Bd1224556ebA1d8Bc48d3f1F5D2e4E1dD",
    "userId": "281054123"
  }
}