{
  "manageEntity": {
    "action": "Save",
    "entityId": "722738",
    "entityType": "Track",
    "nonce": "0x39d41532443788ab91300c483447db6897f07a8586b71e56ba9a1e4eb36a5fce",
    "signature": "0x5bc90e12496e127bee6b91a3bba9f272afaa22b1380ade9fbedfcea4e3e702b61f8479b2886558c5008aa6bffa5150c848f16518e2b61cc1d85251a33ac90c431c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}