{
  "manageEntity": {
    "action": "Save",
    "entityId": "1296962789",
    "entityType": "Track",
    "nonce": "0x565d371b319b0e9fa3cea8e63f29ebb01dafd5d9e29d5d53329fb41a15108ad6",
    "signature": "0x47ba9ffa525a1fcacead868afa8e78a0646e36abfbe60854adaaf53bfce84a8f604a8e48053a238c925087c7430b169a856c6d17a26c06671096ac57f737406a1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}