{
  "manageEntity": {
    "action": "Save",
    "entityId": "752860294",
    "entityType": "Track",
    "nonce": "0x3166ccdabb4d12caf8177782f59b29e49913635449345e9c169d487c9dd3d496",
    "signature": "0x47a0a6aee0dd52bf79c94f6c2c8077c5a7260b8956479b8f04bc11d8b73b5d19177997292d93d2de5d2ea2d937a895bd73eb3cd0f3e4e5385b810355a213c9381c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}