{
  "manageEntity": {
    "action": "Save",
    "entityId": "1065156419",
    "entityType": "Track",
    "nonce": "0x450f5ea23e7bb72b427c8fcea3ec760d5cb8b3a7e1dfc57ece849ee1110fdc6d",
    "signature": "0xd90bfacb06635c791155343b6783edfcc5bbe75fba6f51c054a8646b95a0acb57b00174612e37b69a6e2bb541ae14ad0151c2c198fd5d346bd05b95fdf48889a1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}