{
  "manageEntity": {
    "action": "Save",
    "entityId": "786136518",
    "entityType": "Track",
    "nonce": "0x2dd668e42d042d77cb0711f08b0b3a88a9f88154c84148666e453360b9299c04",
    "signature": "0x1cae23498d20a28fff76d539178d23e618901b5259a06de831be8ea4b395e9576358564fff813f6c679e644e97590253e0e397338a7745c7f012fa046f159fc01b",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}