{
  "manageEntity": {
    "action": "Save",
    "entityId": "1500918577",
    "entityType": "Track",
    "nonce": "0xd740be1f8032d2f69b9b3f877b98c43b69bddad03f78aa48db104250dfdf64e3",
    "signature": "0xe60e7f59c064e436de89fbb813375342b858c0e2ab7be5ded9ab8b3523f46562241e46b56dbe076d7b19ccf6e165a67256750b920c16ab2344f6b78bfe44fa8c1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}