{
  "manageEntity": {
    "action": "Save",
    "entityId": "282299",
    "entityType": "Track",
    "nonce": "0x21d76f4deb5bfdcef668de938886a44bb83bb02abf2379d2c5ddcaae6b4a9340",
    "signature": "0x0e70ad46206e45ef08bba836fceaf420126919ef7ae5f95b6be38f3391d937991eb9cd3614660d4c2abeb4897c970c5cd2d3a986b7cdc6f60bfe622c9f85ac061c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}