{
  "manageEntity": {
    "action": "Save",
    "entityId": "463383756",
    "entityType": "Track",
    "nonce": "0x6db52319899731a4395910302491f0320b6d150b96be8be26f34325525f8ae27",
    "signature": "0xe1fcdb7ca0eed33c3ae7f564053224d30443a2fb4351f1c8556e4aae180ddb7a28159da03cc874e6f6022dc21800c180f82e70346156580191f8b3168e16d5be1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}