{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507164596",
    "entityType": "Track",
    "nonce": "0xe0bb1720c0ff1fa49bc411b08039c04b805a455f39c07c71b92c89a83fc3fbcd",
    "signature": "0x6eb7ebaff61b6fcbfc0bd0a282dd6a91c34f5fcd1b61c5d7b321463490e58d35666f010acd7a0f7fb806a4cc1bc16f40fb374f63a14ad5ad0d9539fbfb5174261b",
    "signer": "0x5D4848bCf5c4abA1a0Fdf2B61408c9e4288aDb0E",
    "userId": "305415280"
  }
}