{
  "manageEntity": {
    "action": "Save",
    "entityId": "2123422836",
    "entityType": "Track",
    "nonce": "0xe4b58aa19c623fc4f4bcb34ada81731c28725eec807e614845ece61ed63fa75d",
    "signature": "0x6bede2f685a45d67af0c4cec79c17dbd0c9d4d83aa7aefe41ee502d7d684a88e1bc183e7901c2761fc2c7af1f75365f90c58ee73a47d773d0b45f89e4c0e4f891c",
    "signer": "0xAA981726F7939BF5eaAbfa9a58D0C454f5cB535D",
    "userId": "398277387"
  }
}