{
  "manageEntity": {
    "action": "Save",
    "entityId": "206645",
    "entityType": "Track",
    "nonce": "0x004c66a9e7269ad2301713224f01903fca6e31291c3e96195992924db513cc9b",
    "signature": "0x1511bc7ec880b626b7b9b0608906a6a5888667718a2558602cf227ad3fbbfbc413f8473c982bba30ddf257f5f542b85fcffd7be112c47e61ecc6e2a5ba78fed91c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}