{
  "manageEntity": {
    "action": "Save",
    "entityId": "1425184925",
    "entityType": "Track",
    "nonce": "0x6cb997e1d674969af91321169a9846798e7c56b8f15c38c50272dd9583f9d2ff",
    "signature": "0x5bcf0e2bb01932692dd40e79078495bb5916bd8f8efe06794e4be643dfa7913116dce3636967c8d97f3ae2c7ef1c2e85abd6ea2fe3b56567895c1372448b29271b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}