{
  "manageEntity": {
    "action": "Save",
    "entityId": "493063057",
    "entityType": "Track",
    "nonce": "0x59740888fef59462989a4283816570df0798c5806231912a13278c3af17a1a64",
    "signature": "0x56e19ad6d8d7807dc03e447285decf9a0e3b7a58e97333b61e962942ca591b8c0da618e6f25b08823788bd51d577cab5e1c9c93e177eec875a04676b368fa5961c",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}