{
  "manageEntity": {
    "action": "Save",
    "entityId": "567625",
    "entityType": "Track",
    "nonce": "0x94ebd869142c7830200145a720a0484778b9b63dc41dd25a80e15a94ef07278b",
    "signature": "0x6133e5a0d437fb07889ab21a931d20b492dfa0deb629601aaac8abb93f5b46a73798df2903e66bab5150997d7fbfac4037fb12d7c0a012ab30268e0ffaffd3bf1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}