{
  "manageEntity": {
    "action": "Save",
    "entityId": "393130553",
    "entityType": "Track",
    "nonce": "0x7122eb41b2401cde7f34a298bd62b2c72949da5337aa551852ca2dd2da631d95",
    "signature": "0xdae573f2d2dd5b56ac180df08929ae96777268a68602ce50e66f5e4fd922813018850dbb9a5d6c7d343258811c6918fac518dca2dc6c35cd0dba523523c7b0ce1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}