{
  "manageEntity": {
    "action": "Save",
    "entityId": "1230295655",
    "entityType": "Track",
    "nonce": "0x33b3b687e49d45650224edbfe8b50f35dd97a473fb1dd6fc3f8de1abeb8dd2c9",
    "signature": "0xcd8b578effa1d25403695c0dd6c0d5b92700c28795db5c48f889d5779273f35a41ae75f8f9d065e972c01b8ee84690e74da361e09f3a0747c68752c0e3fa1f551b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}