{
  "manageEntity": {
    "action": "Save",
    "entityId": "1715264660",
    "entityType": "Track",
    "nonce": "0xb41688bd803a7301bbecab4aa8871f01dc13eec2ae9a5d5c9759cbd9b0369a7e",
    "signature": "0x84ef639f0c935e47aee7a434040ca36d5739ad8b4643ba5b7638e17c43d2d8d009e4173040b10c66ee10698a2a9d221328f70fbc790d95653d29c1694c9671301b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}