{
  "manageEntity": {
    "action": "Save",
    "entityId": "783622",
    "entityType": "Track",
    "nonce": "0xee9b8efd32a840f6d372b52972db71df1ac15b425432ad7629ca7a0bb8937506",
    "signature": "0x98b386f3726f0ba29dd691cb1dd89679c12857a82d58b7581a82934d9cfc4e790ce624b44a6443bed48e68d56dc21ce505c0faae3fa42623d65249907af00d591c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}