{
  "manageEntity": {
    "action": "Save",
    "entityId": "1819871426",
    "entityType": "Track",
    "nonce": "0xecba04e0cf8632a68f88849688b1b565b9c6575e4fb9bb4f4cca1677cd82a132",
    "signature": "0x03f9fff73be11e940d9590fab66027861239cd97e66fe6e875863a6fc5f97c546210450fbe81a91a7dfdb7b68682fa651aabaf96dc8ed767e12b61a2084630761b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}