{
  "manageEntity": {
    "action": "Save",
    "entityId": "625986619",
    "entityType": "Track",
    "nonce": "0x844e7f1b3c4f42a9d4cc91409b2299133e86a8445c5df476db572de7e7cb31b4",
    "signature": "0x33d698864eea6bb04c04858cfcd406ebae945cce1636ade18d8eeee58ecb66615eb0d0e68d75a2c4de3063cadb76a17aa01a948fb98a7bf8f258f5ef1c6326121b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}