{
  "manageEntity": {
    "action": "Save",
    "entityId": "686353",
    "entityType": "Track",
    "nonce": "0xf865f2d9807d61daae06b65de6b83771831a25483249853599718c95e1cff256",
    "signature": "0x5bab6027aabd52c29f67865f49b5cb19798dac01ae51de102f280c80cbabdbf9020dd77a39d407c97645a7132aae96bbd7e1fc482e75515baf748396fd261d871b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}