{
  "manageEntity": {
    "action": "Save",
    "entityId": "443273125",
    "entityType": "Track",
    "nonce": "0x8d24cd5adc08d14f2c368a2fffd99783e28e48e49e9daa39e597881739b5c460",
    "signature": "0x4b09ee8c9bfdcadee8d537201aac9251c758973611b50cdef3cd45cbb5e0b54f3e71da6ea00e40b62cef5fff5b38f8770766d44b161fce9c0f98de5dea725d501b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}