{
  "manageEntity": {
    "action": "Save",
    "entityId": "2081663631",
    "entityType": "Track",
    "nonce": "0x1b795b44a8799c54ad9e4221c54f01cf69c788268f53d614b80a7a44bac70110",
    "signature": "0x81b17eacf7aa359f34b453ca0741e693b49df0fcc5b198a032b718630a543d1d01c8938738df6b6bd48fc1942e55260db4c6c2f1cce7ac39d65ad7b56887db5e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}