{
  "manageEntity": {
    "action": "Save",
    "entityId": "1388217979",
    "entityType": "Track",
    "nonce": "0xdfed000cd32113c6710237eb948ee72486f4f7cb912aa13016ca85c779c91248",
    "signature": "0x4e0230bdb1eccb70dffe761262fa6674d8627886c3b5ba89b0fbb992046859fd7967bcce5ad4cb31215bc8ebf8bd00b664acf86fe5d313b09bbce00be327855a1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}