{
  "manageEntity": {
    "action": "Save",
    "entityId": "1946611743",
    "entityType": "Track",
    "nonce": "0xd6781c32a39fc9a6ae6def4561e702e4060093f0c913955102c0e3398d3941fa",
    "signature": "0x1ce2a8e855022226d4376138c59685dbba1d59bdeee292232d4b0f2d282fadef003399257b1d9a86fccb3c3dbdf7d04e5da196e9c4de499346bf2b3e702833cc1b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}