{
  "manageEntity": {
    "action": "Save",
    "entityId": "310110",
    "entityType": "Track",
    "nonce": "0x572455dc569b310be852f43da13f823b1db24c5cf5a0b784d0b237c15f0283e3",
    "signature": "0xcb50857996c106df9eb182e3bbf86d19cd0d0fa067b205cceea96de041a33d575bab31cdb67b99fe88dd68aa236f33d7f1c902b4c78725edb982d68159f878af1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}