{
  "manageEntity": {
    "action": "Save",
    "entityId": "253431746",
    "entityType": "Track",
    "nonce": "0xcc4cc096204eca2810ae53386d64f49d9194c84c340f7c94fcafd8a2194ddf3b",
    "signature": "0x2f84c4fdcd07d924d0d4c29cf866be5831d50afb2635123e6a67d35a30d280762b033ff533d325fef0544bee4f2c268b7305de36d006089f6ca1288a649e1ce11b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}