{
  "manageEntity": {
    "action": "Save",
    "entityId": "1790507328",
    "entityType": "Track",
    "nonce": "0x86f81e674b0c4e6a2ad5f376cf3d3fa33f39a8e6bf4712168a841591fa638842",
    "signature": "0xdc5b4e7aeb74cab737b7593cec04e81ff055954c740a1b03c32edb58f3862f12083f5b18693a824a383860e179ab79c173406852fe52f50cce3fb78993564e251b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}