{
  "manageEntity": {
    "action": "Save",
    "entityId": "1546936547",
    "entityType": "Track",
    "nonce": "0xd250b9a118b63ed57156e9e37c24cb1b91fc333891b066396cd70a2e80c2b87b",
    "signature": "0x13fcf6879da23dfe7eb95e61c9bd7411b36dbcee3ae2002bd3ffb6cebbf435ae287f50fbd20093d51fc3bf32dca89d2c54660540d17daa894966e9e060966ced1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}