{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131156",
    "entityType": "Track",
    "nonce": "0xeaf1e9917a1c6ed6e8dd256c4267abd23c185bb9841e0015ff764052a4d4e7f1",
    "signature": "0x457afd25f0ddc07bf749db7fa7fb19fee1fa4f03863130d5d63843e2fa26c49f602b1569a0c282fe63ea03460191dfea05e4dc4e0603177f6a485a7311a035a81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}