{
  "manageEntity": {
    "action": "Save",
    "entityId": "293910740",
    "entityType": "Track",
    "nonce": "0x33ee3e57ae97c5c4bdc623b052ee42b1ab853cca413051254d0ffafeea4b05eb",
    "signature": "0x78785d66498375744cf76f8a661bd64785d92b7d278a401d434412efee7fcadd0d6e6348869266c9cac4b13e39d9ebd7e12b43d49532be2cba1cd9100c350ed11b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}