{
  "manageEntity": {
    "action": "Save",
    "entityId": "495960747",
    "entityType": "Track",
    "nonce": "0x8dede370c9e9206d3a7c41647384ec82df7419f2608fee4e766081747df65243",
    "signature": "0x47b13c34cce792d54ac6c9e0b5446d18d0f3d043ecc1b980d9513a56649a632311cfbae060a90167555c8e5c93295bd2107ea881872fe0f064e22c4bd625a0091b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}