{
  "manageEntity": {
    "action": "Save",
    "entityId": "2086520640",
    "entityType": "Track",
    "nonce": "0x4d8eaf7f532e5b586d0585997d2ea9e74694c15083299597a3c7167c904101e1",
    "signature": "0xfc0f606e402efdb1f28c1b97fdece5a2f598b1054df07dbdb6fb361b137bc70b1a8a51bab39e30979437a25bfb472f1e26502f76dddf1318deb72aafb3ac81b81c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}