{
  "manageEntity": {
    "action": "Save",
    "entityId": "324884",
    "entityType": "Track",
    "nonce": "0x11dd11d0276274a18358f92ee743a0b2aa66ff4daef2965128c9189865fb34b0",
    "signature": "0xa458a8a97affe5b27be854aafd2693881e80a3862b0ab9ff08e1164e8e33eef901ad6a9c3edf4d9ab894c3616da5e35d2373f0c28ebe16aaac5940cdfbf466711b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}