{
  "manageEntity": {
    "action": "Save",
    "entityId": "912222062",
    "entityType": "Track",
    "nonce": "0xbece3350e751d3f978da5a400a2608c4b8078e4f6482be868e998746cec2e3ad",
    "signature": "0x1e99e3d4fd8b5c4e036401d01b607cd7bfed49e6510376e23ef9b43508f4d9d141a81bbf5a5cc6d34b89e907e4c85bd30c07cb753a7873c3b3c58273351b3e961b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}