{
  "manageEntity": {
    "action": "Save",
    "entityId": "459986732",
    "entityType": "Track",
    "nonce": "0x144020868ff2f4a0fb776fc8efde0551b055a76d04830ed9847b32033bada72a",
    "signature": "0xfc155bfab7cabf0d9e7ea2bbae57de71722700f21810d1e0dada553f5ba4f0524294eb804cdf397d8e9d2c7f3e6f15a5965d3cf4d1c8ba10a4cb3407ed5d47f31c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}