{
  "manageEntity": {
    "action": "Save",
    "entityId": "888353811",
    "entityType": "Track",
    "nonce": "0xebc02ff1874b2bca87d350f59db6e0ebc5469f8e42eba3f3e57dbc4425cd4c58",
    "signature": "0x990bbf2e7836f3cd803c39dd17d1b884609161ccb8f26ec147f154a69767423b7d826b4561fa8c8cdd73f7e0b0c139bac5acf118c78233e47e52fa63fef138311c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}