{
  "manageEntity": {
    "action": "Save",
    "entityId": "1312308941",
    "entityType": "Track",
    "nonce": "0x07a46b162ec37c4ef2cdd9f15af0157ff4696b5a87dfb656ccc9ea4fe617ba19",
    "signature": "0x93f1faec4fe3ac2516cec60f2f2dd352a88836a69187ba6f1849416e6408e5f9002df1dc6d1687720e0b6726ad822a90900e109c66e53aabeb2b1a6f71594e281b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}