{
  "manageEntity": {
    "action": "Save",
    "entityId": "1281266969",
    "entityType": "Track",
    "nonce": "0x18228f1867c9de48b99b3f5f4da1dfd7ce99d27912135855fdecaa25cef1fded",
    "signature": "0x66cdbb0995161a22aa1da7384ef21e909dfa5dc71a0150a75696531aabfc6db56899166719dfd05419017841b0510870c30f9deb4f3ec55ee7fe220a32c43f721b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}