{
  "manageEntity": {
    "action": "Save",
    "entityId": "685754559",
    "entityType": "Track",
    "nonce": "0x281fb3cf9606853f21fdfbd6d5ecc50db779e7f055f95ab96e54b97cf75a2e3b",
    "signature": "0xc5edb317df539b0fcfce9082c1c71cdeba18966e993ad2b592af6e6ca9f998b52bd24d76f27da849da7596d02bddc1158b0d2796cef4e82936e23966a613cf4f1b",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}