{
  "manageEntity": {
    "action": "Save",
    "entityId": "138088985",
    "entityType": "Track",
    "nonce": "0xd9e2b23cb078347b9e9d12b3167cc96bfd381f8abff5fad668bd95426c482721",
    "signature": "0xa29f8682d7bdb1820bac43d675cc9d815057108f161516947e1aa43c8e4022594974d97e5df0a68df20b1fac1feb299fc67a991d37974db6950acbada1cea7f71c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}