{
  "manageEntity": {
    "action": "Save",
    "entityId": "431130445",
    "entityType": "Track",
    "nonce": "0x6c47fe1c7c303c9d0df557dc5d298a6815f33382b68bac022dff14a44bc7c733",
    "signature": "0xbb964b347513c9199ac89547e11af4618e25014848fc299d8bbdad530f793b083029b1e1adf90fa6a5acb3fcd811c058986af2b3073ac5213080e143d957af271b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}