{
  "manageEntity": {
    "action": "Save",
    "entityId": "1197542051",
    "entityType": "Track",
    "nonce": "0xb22544ec91926490ff1fe7d393e8fa0c551ea83c0f681d47bc2437b663e23e44",
    "signature": "0x81c63ef63832de5c639d853cc55034df2aa7da915213199f5ac5452a6dd9a77918ecbc8322701e343701757a631759d49e5bbabba2e7f626be5ad194b913f15d1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}