{
  "manageEntity": {
    "action": "Save",
    "entityId": "43424195",
    "entityType": "Track",
    "nonce": "0xca398df2130059058be645af6e6f6dc61ad1967d704f0f9024a3400543868297",
    "signature": "0x2b4fa9d010a93dc98ccb2ad0348e6c84b81103e5e606ff521f3fd02ae870b86042c617585905de1ac48a6e89da7198a136cfe2e39969db875d95633e756f93411b",
    "signer": "0xcdc1772589e70ee6667FAaC93E3F0CcD5BFDa2aE",
    "userId": "354908"
  }
}