{
  "manageEntity": {
    "action": "Save",
    "entityId": "1738025056",
    "entityType": "Track",
    "nonce": "0xa3d7c3f062b5e4db5ce74bb4cc0123c462350f1a8c802d3c08a4512c0daf267b",
    "signature": "0xbde4963c9184d44a3366a9609af82b9eb43d5c1e7517a0d60201c3189eb138261ee03d1e728798c94f856a17508ac14447e8d94bf0a0cf6f7fe2b2c406fa122d1b",
    "signer": "0xaBca4973b8911Fb110a95E6e00e5BBFBCa671473",
    "userId": "832058678"
  }
}