{
  "manageEntity": {
    "action": "Save",
    "entityId": "652155403",
    "entityType": "Track",
    "nonce": "0x7b2e24bf5fd2b46404f71808145771ccb42defa601d30327496e4ee50dc5c266",
    "signature": "0x620be2c08255e7729d2506115209e995bf8b862b3fe4f1831769695cbc50113077e717fe180d8e598cf8b0de22d3dabd70b8b0dd16fcc4809ec20e962a2fa46f1b",
    "signer": "0x4B8960b62360073E2472A74bfbd80138387fE211",
    "userId": "86339"
  }
}