{
  "manageEntity": {
    "action": "Save",
    "entityId": "1548581627",
    "entityType": "Track",
    "nonce": "0x16e1d956a7244233588fe368ac2c8c42ab5456c3e395ab47ad58b899c4546c18",
    "signature": "0xe93e7bdb321366c02f6f17e7efc8dc3c2317a1e93ac08cac993f8a548f3cbd1c0220ffca0ddfce07fbbb339a813acacfa19fbe882e21b6424baacb69023400601b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}