{
  "manageEntity": {
    "action": "Save",
    "entityId": "694809",
    "entityType": "Track",
    "nonce": "1792290930330022781",
    "signature": "0x3aa3f23f8534dae6fcf97724e0102df1d2416cb4f0aa666076e62d59f93b92634691a8ba03bc6357ef4c9a49fbe64d34519c2fa4bf7559b0e8f007543ba5b1531c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}