{
  "manageEntity": {
    "action": "Save",
    "entityId": "922589",
    "entityType": "Track",
    "nonce": "0x430b7dda2857a347b216af159c8500c76a787e70a3ebde56144c469e64de2bf7",
    "signature": "0xcd7e49c729dbe59119894c149d1a471def6b0fa3418e35260775489af8ddb09e54a6a5183fd4d1106030a0074c8fd3cb06e826cc4364c028f84e4dc88011d4cf1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}