{
  "manageEntity": {
    "action": "Save",
    "entityId": "591117290",
    "entityType": "Track",
    "nonce": "0xf0032470c60878f30cfa361cfd771654dc9bf0ad0e97d3674506ad7c0287236a",
    "signature": "0x063ba2b4d9d0a80fe982d911284db2b5c37c6138e7ecd157597772ea45ed52551dd4f7b7be4d567012cb2d01d4023c94740b1793fabcbdfe6722dc902e36016a1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}