{
  "manageEntity": {
    "action": "Save",
    "entityId": "830808844",
    "entityType": "Track",
    "nonce": "0xe3ed5cba9b963a02d6005b716ee8bd4bbbb98a0b417a65169466996cfce30ab0",
    "signature": "0x4c50a00b31dde3772f161790592e6d677f882a932e89c89fa3b721eadd34f4c93ffe2f4fdcb6cebcc8fee38ac1bff04c59b877d505caddbe0dd8a1a55998dbd21b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}