{
  "manageEntity": {
    "action": "Save",
    "entityId": "480248",
    "entityType": "Track",
    "nonce": "0x56c5d52cadcea082e0bdadeed3a51c76e70ae0b3ac646a1357d6cc4db2417dd6",
    "signature": "0x1c6edd019c9c8f269b6a09b0e9f791cb1e7974828c1e41971e55e282f8da5b213f3ce8b5ac8ed4fe9b3d672a8247658fa135591835b0f7424eb3229540417fe31c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}