{
  "manageEntity": {
    "action": "Save",
    "entityId": "615432",
    "entityType": "Track",
    "nonce": "0x29f9ecc5a21fedf69e6c2f32a6f43de2a984f419ac6c4cddb11e8591977bbdd2",
    "signature": "0xfa3b1cc1b49591be39cddcea024d768618db25fb054fb0e88b2313e969bf76ee2b51e37d8ca4226cd18fd1210da94b400065ffb380baadd281d62c19623808571c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}