{
  "manageEntity": {
    "action": "Save",
    "entityId": "1728986895",
    "entityType": "Track",
    "nonce": "0xc1131b37ea02aabed828b8f8566029908c439615fb2a76153b87e969f30b4153",
    "signature": "0x5add338ae8c576a7d336667558cca3e5eb25677e4dcda981b510153a641d6d746958bde269a25607aefe5f4b2c321eb40ac7d46e28155a22b24929e91092aa011c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}