{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030626122",
    "entityType": "Track",
    "nonce": "0x857808dee0161089327f9df5c0c7dc10d95c258d4be50601596d04bcd0207694",
    "signature": "0xd3ae02e7f47765cf8621182c6fc9d286d3ed70fdab7e984271c58c0673f7272b5c827dad6cc5a9670d59068e8d550ec13c21375a9896b2a84f74da227b4a24f31b",
    "signer": "0xF2c19977A72e7f63bBbD9063748E52c002b22f6b",
    "userId": "957488166"
  }
}