{
  "manageEntity": {
    "action": "Save",
    "entityId": "1487679235",
    "entityType": "Track",
    "nonce": "0xd7f9699913c950e2fe9c10c629a24a88d05d90ecaaffc6297672ccf8489cc00b",
    "signature": "0x90dbbb368223bef6741aadafc8c0b0e2c30afb9b970ae06191157a3e51cc05f53ab9a80ee4e7983bb2230470027ea17fe1645cd7ab5e759d0d1cca4e03e28c7e1b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}