{
  "manageEntity": {
    "action": "Save",
    "entityId": "994685",
    "entityType": "Track",
    "nonce": "0x13b6f7595981854cb2bc760f6a4e4c6725058785ebe918afc0f143d58df20c1e",
    "signature": "0x0010c9aed435835d8df5e587dd96b4a0748fcd05d7a374b8eace27ff94dc9fdf0c862615cc6d72e7c2f2a5f7e6795cfc9cc21dfa9020c08bf04c4c975e3fa89d1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}