{
  "manageEntity": {
    "action": "Save",
    "entityId": "948710884",
    "entityType": "Track",
    "nonce": "0xb2b27ae0bfa1e7a5e66e7cbc1d4f565ea7790bc92b7bbd7038e612799cafa116",
    "signature": "0x796db27d4a322e5ecdb90b63a0d9896aa4de19c56e4ce41d0ad6bbaede538a5b7e6d7a1b9c6868d5da52d004cdc3bf81958e2f9fcc3b0fceb0b2e9e4ee5842fe1b",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}