{
  "manageEntity": {
    "action": "Save",
    "entityId": "2013668835",
    "entityType": "Track",
    "nonce": "0x07a3658ca5ff40cb69335217407ab4777dce6d71e4d6e19b9174590e0b3898d8",
    "signature": "0xcd8ad57c2280a3d1ec52af617e03ab6b1cda8ee613b94d9bf5028954922337995711a8e9b3bb692e95c6987fe41ebbd0cc5346facc38b7c377748a30f7e161301b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}