{
  "manageEntity": {
    "action": "Save",
    "entityId": "575986202",
    "entityType": "Track",
    "nonce": "0xb07687afea96abc61dab2b5c424ef12ffb647f4bd012f32a4f1c89ce29079c33",
    "signature": "0xa551ab8f8efc12437be9714ee903ffe9dd0ac1e60da00214cabf8e4a39e69f606a15d6ee24ec326b0f801174f27a0fc1299dcbcdf6c28297d3e3773eaf68931e1c",
    "signer": "0x12705C8Fe8CE886CeFEFa0d4d46E906f2c35C954",
    "userId": "477934274"
  }
}