{
  "manageEntity": {
    "action": "Save",
    "entityId": "55184534",
    "entityType": "Track",
    "nonce": "0xe97d4517926649da63a8897ff032eef8f510cc8253e9ce67dcc7efd9dd6870ae",
    "signature": "0xa380cb9f0e3116353de76f4c3c1399447c2ed36552b7c2d0f2a5b65f316758837f38e990955e25b9a8877f7a2a102a1e5e8641e72731ef929972f1bb0fa06a2a1b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}