{
  "manageEntity": {
    "action": "Save",
    "entityId": "846332214",
    "entityType": "Track",
    "nonce": "0xb27d733e58695ea2a7c3944803b175741732fd5ad1ebaef2ae9a9db4c5cbfae5",
    "signature": "0x7a8de94523126f234ee519a4ec8533ca31599120894a2f925717cdd7b859f1336b4f7377c46c1a8233c9d736127cc76c5f38717b51d5130c8911e9dd6e1e32e71c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}