{
  "manageEntity": {
    "action": "Save",
    "entityId": "1587",
    "entityType": "Track",
    "nonce": "0x3138db1a51b0c019729b36e4af798b0305d5a86745bafb74a4d8985fa897675e",
    "signature": "0x6577ebcb716ef5b796ddeacae0c9514649a4dd317c4e804c2c97663b9feb1b345668a787f9921405dc2b2c7d2f10e52acd15624d728c1852eedb9e57ee6f4e651b",
    "signer": "0x01eB7915E4941D64a8ddf370bE06647ad5F79d4e",
    "userId": "911613164"
  }
}