{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909630725",
    "entityType": "Track",
    "nonce": "0x5c112a56f194adf406c034c7ec2e6c1f9ede9b00567e5eff338f663bd46c43d2",
    "signature": "0x2040cb750f8f111847de33a0b00e9738ae0398e47aebb7266a09118f5d52c548488fd746faed1105e7f58b2123c62da286a7a5047f26f7f2b811ee64c8b688c61b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}