{
  "manageEntity": {
    "action": "Save",
    "entityId": "910583006",
    "entityType": "Track",
    "nonce": "0x62d7bf6e1588353d28bda6d423314bae81b23f36959b19d0fadda772023e8305",
    "signature": "0x98049255f24a9802ddac12d67a9d74c2388b30c8af4431066089b8acbca9f20f6f54013ae19e131789df6fa97fab9aa7ace082c15ba7e0c02fb79af39574c2f91c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}