{
  "manageEntity": {
    "action": "Save",
    "entityId": "1479114264",
    "entityType": "Track",
    "nonce": "0x548d149f6ad86aefa092f7508bc1d3874787ce348a72721f0140abfefec21436",
    "signature": "0x3f9ef9b5048bd98b602d0c4360d2ef5df74baee4fef53415b03ccfb53baf28f94426e98298c9814af58375ce53c51e0c24b6af9c73819bf520cba05b775b45a41c",
    "signer": "0xE0EaB915C3153F4a2DF5C6e7b8D58dAc829Fbf2f",
    "userId": "774741623"
  }
}