{
  "manageEntity": {
    "action": "Save",
    "entityId": "73638788",
    "entityType": "Track",
    "nonce": "0xec422306d0918872f1332f0c2e5c69d9e01eb9b317a09b1285362e0ff87d112e",
    "signature": "0x302043832faa3751d014e505ea035123ee73eec2fa05d0d7762c3c809d083a3801a6731ccaa409427d7548ac5d759bc6e5660b1110c73533047e7ab3e5a49e651b",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}