{
  "manageEntity": {
    "action": "Save",
    "entityId": "1843600032",
    "entityType": "Track",
    "nonce": "0x8eb49aa6b581e0d887672eaa4c2ed19b53a36fc28636fde4808da4dd8ad061f9",
    "signature": "0x01de8bae6cc38ab95c9742cb349551c80eca2712a1bf126fea6741c3b9c90cde66407ad7081360c237c9b1691e2c53498e82a3bfa98f6c5eaa98976fc26536491b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}