{
  "manageEntity": {
    "action": "Save",
    "entityId": "1342122392",
    "entityType": "Track",
    "nonce": "0xc3c1f9b46a4b7d8481c6e1c15d5bba9a31b737ebe621be9d406256605a75f61c",
    "signature": "0x9052a179cd7dd1b567fb04cb6d44ce63e1344c7970ec55d91e4cf1a3a97edf776bb102e8f7cea64b40e854e5cc69c4d01501efed140523f2cd98e610689cea6d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}