{
  "manageEntity": {
    "action": "Save",
    "entityId": "946658979",
    "entityType": "Track",
    "nonce": "0x04fcbd33d403eb0dab692468bcf923f1b01adf392b2d6eefaf96b4568ef88908",
    "signature": "0xabd24ade255568153b2fb0e27c9e35d5eddb98a5f16c069b8052bc16bc4242c715098dd74cdc955d7c4e1beff9869f25ecfcd43150a3d98e5a693fc56195c9e21c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}