{
  "manageEntity": {
    "action": "Save",
    "entityId": "315128887",
    "entityType": "Track",
    "nonce": "0xbd98ca6ea0451a15a20a6a86aeb13e60d2dcf7931baaa5b6ac8cd2f262fffbf7",
    "signature": "0xaa9cff991587d6832823026e22e790e44c64aea853b7d3f03885ea5693f6bc1856cce7d19bb305e783a48ecccd45fc45493ce1046a202140da306f8bd71d14d01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}