{
  "manageEntity": {
    "action": "Save",
    "entityId": "531170390",
    "entityType": "Track",
    "nonce": "0x7a39fc2dcaf21007bc957548b5f43c5a57b8bf9d8a21c2d99b8d9dc16b26c662",
    "signature": "0xcd68a433ed37aeefa73ad3d137f67c62d2c6f920618f243b252418b85d5df04f1f900dbca79ab133993f750f003d834759dba8054d004c9e458b66260080472e1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}