{
  "manageEntity": {
    "action": "Save",
    "entityId": "1811669564",
    "entityType": "Track",
    "nonce": "0x14af9df8e6c1802ee98e358956c90c2eb68941ab06c88f879305c09f7e560ed3",
    "signature": "0xc3865bc1d51f35938b3f28c1c3c5ebfeb8831bd06746110c2f46021278631dfc6ff1025ecdcfa4c4071aa27e7275952fe81a52395a4e0d1802dd8b9b485d11181b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}