{
  "manageEntity": {
    "action": "Save",
    "entityId": "485753032",
    "entityType": "Track",
    "nonce": "0xf9bbc53e19919574b548fe2f11161ffbb8f5c57958fae8047c7106736019dff9",
    "signature": "0xd8e57128e0cadf2c74394043a5326b4784df67cfe573f6506aa364dd2df7f710207640e4eff60ba0e8bfac8b33e88a5d10d3684b1f4739c4cec8887a9d96e1601b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}