{
  "manageEntity": {
    "action": "Save",
    "entityId": "540450",
    "entityType": "Track",
    "nonce": "0xc1105559afb1781030faa1a6993a2574ea7ede9c97b976e0e18d1c981d1fec30",
    "signature": "0x05d8da97435653457cede220a6cb632ac4938484ff6e1a04dc6e5a98d8861b6e1123597745536d3cd7a45043692cac31d0aca04010bb376367555bc7b58b46f01b",
    "signer": "0xe270C91f9476B885124d6c0208211213dC10036a",
    "userId": "94825285"
  }
}