{
  "manageEntity": {
    "action": "Save",
    "entityId": "1914276366",
    "entityType": "Track",
    "nonce": "0x8e77b364cb70e6e72a86896058fc02b4f62f86bfda8a819c62c15692c8e17202",
    "signature": "0xcd9b14ed30e80db7219c00da78775baf3db6f35bddc1d939fdb0f9d9a9e6bd1d1860241e8019025cef86ecb1675fa2c5806f06cdd6dd8869c6ac741c85f5fb941c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}