{
  "manageEntity": {
    "action": "Save",
    "entityId": "69146173",
    "entityType": "Track",
    "nonce": "0x17aa00e00dc11571e3c18b0d05087a894345ac25634ab873ff38f766a22f87ab",
    "signature": "0xf7bf436b4a3eeb7acc949eaef3800a41b4e9b84c6cb54239b7e09a27b8c3101450153024d604968a6b97062185ec128c5b14f5bcec3e7757a5c8df7a273d5aa41b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}