{
  "manageEntity": {
    "action": "Save",
    "entityId": "1817168716",
    "entityType": "Track",
    "nonce": "0xaac37f1ce48a779e105f8427da45dd020220dd1514265f852e3e60abe01e938b",
    "signature": "0x0388587017837a6f77dbbd046d25b921be4e82ee0e6e5db769d7f6da6a1c784f5e56a653a5968204e4cb1034aeafdc3b73990d9384f539ab4d384ae499c1d5c51c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}