{
  "manageEntity": {
    "action": "Save",
    "entityId": "1330720954",
    "entityType": "Track",
    "nonce": "0x610a96d8ca11edc36d2357020930c720c74137a2bc2d71846d27c5e440d4e717",
    "signature": "0x8af888c548e22012a142630cc2b121b8bf1e949d27d41b51e44df3a798bb5df0411ee7ca9fbbdeee1be281d5100b2bab4704b2b4fda8ae5b38f29ac176d8eb701b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}