{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030446923",
    "entityType": "Track",
    "nonce": "0xa700136a416d4460cef7cd8de84fa3683ddbdbcec517d8304d66120eeb030979",
    "signature": "0xcdcdd753a8a1a9d9530733338e68a0bf1b37155b3f2549b7dc6c7012cda5827a18dff309f334a6307f9e3a9f2dc9722a6a9181e1732507e42d4eb0f1be141bdb1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}