{
  "manageEntity": {
    "action": "Save",
    "entityId": "2114468783",
    "entityType": "Track",
    "nonce": "0x543d896779d568ecc787493b1e5003e70e781f6e5239b0ca42ff7b50491279f2",
    "signature": "0x9a8201612f0f3408fc8ebd6c261a93d610572376e6b058a81f578ac42b4d824a31bd3415bfaa760b55e24ed4a41d9c3684df98c546dbbcf7fb94e186779d8d751c",
    "signer": "0xd648B38B61b65e4F8df57D4EE65560D8DaacFDb2",
    "userId": "277314120"
  }
}