{
  "manageEntity": {
    "action": "Save",
    "entityId": "1301427938",
    "entityType": "Track",
    "nonce": "0x674e2ef87e9dd253b26ba83ffad83315d463367cccbc917ca8c8520c1f951892",
    "signature": "0x60cbef9e760021c30a5aa6647a2d00cb40442cdcdd991e04c5d593bad7fc5c1a3e0cf99b085c6458bf756f561b8b586bed649ddc4d385410fd87a3837269ce191c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}